Carbureter.



P. H. HEITGER.

GABBURETER.

APPLIOATION FILED AUG. 21.1, 1907. 900,731. Patented 001;. 13,1908.

V-l 1: i

L /60 y f6 e? 6'/ a fg, 24 5'/ l v L, /u/b v Aw narran simens earner ernten* FRANK H, HEITGER, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO HEITGER CARBURETTER COMPANY, A COMPANY- ORGANIZED IN INDIANA.

meenemen.

No. eoo,73i.

Specification of Letters Patent.

Patented Det. 1S, 1908.

.application led August 2e, 1907. Serial No. 389,976.

which the following is a specification, refer- I ence being had therein to the accompanying' drawing.

My invention. relates to improvements vin carbureters for use in connection with explosive engines andwill be hereinafter more lparticularly described and pointed out kin ythe claims. y

The object of this invention is to provide a carbureter in which a more perfect adinixture of the fluid fuel with the air is accomplished to produce the explosive gas preparatory to its admission into the cylinder or cylinders of the gas-engine to which it is connected; also, to provide a means for more effectually controlling and regulating the supply of the Huid fuel to the fluid fuel reservoir of the carbureter; also, to provide adjtistable means whereby the air admitted to tlie auxiliary mixing chamber of the carbureter is automatically controlled to properly inizi, with the atomlzed or vaporized fluid fuelvwhich is primarily mixed with air in the primary air admission nozzle to obtain the proper explosive mixture to perfect the inixin'g process. -I .attain these objects by ineens of the apparatus illustrated in the accompanying drawings in which like numerals of reference designate like parts throughout the several views.

Figure l is a longitudinal sectional View et my invention of a carbureter: Fig. Q is a sectional view of the' same taken along the line'2-2 in Fig. l; andylig. 8 is a detail -view of the bottom portion of the air mixing nozzle showing a portion of the groove and the screen thereof.

l will now proceed to describe the construction and operation of my invention in detail in such clear, and exact terms that others skilledl in the art to which it appertains may be able to construct anduse the same.

This invention 'of' a carbureter is coniposed of the auxiliary mixing chamber 1,

the fluid fuel containing-reservoir 2, and

the lower or primary air admission and mixing nozzle 3, which latter is removablv secured to the base of the auxiliary mixing chamber 1 and secures said reservoir to the latter as will be hereinafter described.

The bottom air-admission and' primary mixing .nozzle 3 is provided with a lower sleeve 4 which extends downwardly from the base or larger portion through. the center bore of the gasolene reservoir 2 into which it neatly tits and a supporting collar 5 is formed integral on the periphery of and situated on said sleeve in such position as to bear against the raised bearing surface of the under side of the bearing 6 of the reservoir 2 to support said reservoir and secure the top bearing edge of the outer wall of the llatter the counterbore formed in the base 7 of the auxiliary mixing chamber l toform aclose joint therewith when said nozzle 3 lis secured in position. The base or larger portion of the admission and primary mix ing nozzle 3 is slightly tapered upwardly and is formed like a truncated cone, and said nozzle, at its reduced or smaller portion, is provided with an expanded or spherically formed portion 14 on the top portion of which latter is formed the ejecting nozzle 15 which is threaded at its outer periphery 1to be securely screwed into the similarly threaded bore formed in the base 7 to form a close joint therewith atthe same time to be removable so as to detach the reservoir 2 when such is desired.l The ejer-.ting top end of the air admission and primary mixing nozzle 3 is formed with a tapered or expanding bore with the larger end situated on thetop to form the outlet and this form is provided for the purpose of permitting a gradual expansion of the imperfectly mixed explosive compound before entering'iuto the auxiliary mixing chamber l, to be again agitated and mixed with more air.

An elbow 8 is bored to loosely fit ou the sleeve i to be 'adjustable thereon and said elbow is removably secured on said sleeve by the bolt 9 the threaded. end of whichis screwed into the similarly threaded here of the boss l0 formed on thebottom side of the grasolene duct il. rlfhe gasolene duct l is formed integral with the baseer larger portion of the air inlet nozzle 3 and the same .operates as a strainer for preventing sediment or other foreign matter entering said collecting groove and from thence to said duct.

The gasolene nozzle 16 is threaded at its bottom end to/be -securely screwed into the similarly threaded bore of the boss 17 formed integral on the top side of the duct 11, and said gasolene vnozzle 16 is of such a length that when secured in position, its top outlet end Will be situated at or near the center of the depth of the enlarged portion of said air inlet nozzle or the mixing throat 14C so that the gasolene as it is ejected from the outlet end of said gasolene nozzle will be taken up by and partially mixed with the air as it flows through said. throat 14. On the top end of said gasolene nozzle 16 is formed a collar 1S which is flat on its top side and rounded and inclined on its bottom side so as to deflect the incoming air which passes through the throat 14E so as to impart a circular or undulating motion or wave around the exit end of the valve seat or open eXit end of the gasolene nozzle 16, not only to prevent the gasolene as it escapes from the gasolene nozzle being forced back but also to create a partial vacuum around the ejecting end of the gasolene nozzle 16 to facilitate the spraying of the gasolene as it is discharged. The baffle collar 18 is situated relatively to the throat 14 of said inlet nozzle 3 so that the rounded bottom portion thereof will be approximately concentric with the center of said throat.

The valve spindle 19 is provided with a screw threaded portion 2O which is adapted to bel screwed into the similarly threaded bore of the boss 21 formed integral on the top of the auxiliary mixing chamber 1, and a jam-nut 22 is screwed on said valve stem and adapted to bind on the exterior top trued surface of said boss 21 and the same is provided for the purpose of securing said stem'when the needle-valve 23, situated on the bottom end thereof is set at any required positiona corresponding to a certain quantity of feed of the uid fuel. A bafliacollar 24, having a flat under surface, is formed on said valve spindle 19, and said collar is situated sufficiently far above the pointed end of said stem or needle-valve 23, that the fiuid fuelY as it escapes or is ejected from the nozzle 16, after first being divided by said @maar needle-valve, will impinge against the under flat surface of said baffle-collar to break the oulflowing stream or jet of fluid fuel into a spray which spreads radially and outwardly to be taken up by the air as it passes through the throat 14 at which portion of the nozzle 3 said spray'partially mixes with thc air in its passage therethrough to and into the auxiliary mixing chamber 1.

0n one side ofthe fluid fuel reservoir 2 is formed a settling chamber 25 which is situated between the reservoir 2 and the fluid fuelY feed chamber 29, so that all the fluid fuel supplied by the feed chamber 29 must pass through said settling chamber to the reservoir 2 which fluid fuel in its passage through said settling chamber may deposit any foreign matter or sediment in said settling chamber, and a needle-valve 26 is provided to close the drain opening 27 formed in the base of said settling chamber. The valve-stem 28 of the needle-valve 26 is screw threaded at its top portion to be screwed into a similarly threaded bore formed in the side wall of said chamber 25, and said stem is of sufficient length to project beyond the exterior side of the wall of said chamber to be readily turned from the outside to open or close said needle-valve. The feed chamber 29 is formed integral on the outer side of the settling chamber 25 and connects with the latter as previously described. ln said `feed-chamber 29 is situated a center-pin 30 upon which the pivotal end of the arm 31 is pivoted toswing and said arm is of a length sufcient to extend over the settling chamber 25 and project into the reservoir 2 sufficiently far to be connected to the float 82 situated in said reservoir. An adjusting screw is revolubly mounted in suitable bearings formed in the upper and lower plates 341i and 35 of said float 32, and said screw 33 is screwed into the boss 3G formed integral on the swinging end of the arm 31 so as to adjust said arm 31 relatively to said float and consequently to fix the maximum quantity of fluid fuel to be supplied to said reservoir 2 at one time to maintain a certain predetermined level.

The float 32 is constructed of a suitable buoyant material, such as cork, and said float is made in the form of an annulus of a size to freely operate in said reservoir 2 so as lo rise and fall freely as the fluid fuel in said reservoir rises and falls.

The fluid fuel feed valve 37 is formed on the bottom end of the valve-stein 38, and said stem extends upwardly through a bore formed in the arm 31 to and into the bore of the spring containingsleeve 39 to project sufficiently far therein to be connected to the top end of the coil-spring 41. A collar 4() is formed on the valve stem 38 and is so situated thereon to contact with the bottom side Cri \ seater fuel in the reservoir 2 falls the'l'oat, as'it descends, will cause the arm 31 tobear against said' collar 40 to open the lfluid' tujell feed valve 37 toadmit a fresh supply of the' iluid' fuel: to replenish the reservoir 2; The coilspring 411, situated in the spring containing' sleeve 39, is preferably Ina-de with a smaller or reduced top endwhieh. is adapted to be screw-ed onto the threaded top end of the stem 38 tobefreadi-ly attached; thereto or detached therefrom,- While the bottom end oit saidl coil-spring bea'rs or rests upon 'the bottoml end of the bore of said spring containing sleeve 39, which latter is removably securedV to the top ot the feed chamber 29.

The valve-seat 42 is' screwedi into the air. inlet end of the'auxiliary mixing chamber 1v to be removable and the boss 43' thereof is 'bored andthreaded in to which! threaded bore is screwed the valve guide and adjusting stem. 44, andy a jam-nut is screwed on said stein; to be situatedf eX-teriorly of said4 boss, andl the saine' is provided? for the purposeof securing safidf stem 44 when adjusted to; fix the tension of the valve closing spring 45. The'air inlet valve 46 is boredIl centrally to' loosely fit and slide on said stem' 44,.and' said' valve is adapted to seat against the trued' bearing surface o the valve seat 42. A; spring centering cupz 47 is lalso bored centrally to loosely fit and slide on said stem 44' with: thevalve 46,. and said spring centering cup is yieldinglly held' in contact with the valve 46 by the spiral spring-*45 Which latter is made in the form of a cone Withits larger or base end' situated tobear against and be situated in the cup of the spring centering cup 47 and: itsslnaller' end reduced to such a diameter as to fit over the end of the stem 44 to which itis secured, sothat the tension of said valve spring may be readily adjusted by turning sa/id' stern 44 either toI the right or tothe left the desired amount to regulate the admission of air intol the' auxiliary mixing chamber 1:. On the opposite end oli the chamber 1 is situated! a-connecting-nipple 418i whereby the carburetor is connected to the engine pipe. throttle valve 49 is secured onl the stem 5() which latter is pivoted inthe bore of said nipple to be revolved therein, and said stem n'ojects through the' top" ot said: nipple suiliciently far to receive the lever 51 on said projecting outer endl. rlhe lever is connected to suitable mecl'ia/nism' to be under the control ofthe operator, soy that said throttle mayv be manipulated to regulate the opening of said nipple to con trol the admission of the explosive mixture' to'the engine.

Ai bafilesplate 53; is situated betweenl they airinlet valve 46 andi the outlet end o the 4 nozzle 3' andl said baille-plate 53 is termed: integral with the base 7 and-extends across the interior'of the auxiliary mifxin' chamber 1 to connect at its ends to the Wags of said auxiliary mixing chamber, and? said bailleplate is curved aft its upper portion to be inclinedf' over the outlet or nozzle-end 15 of the primary mixing nozzle 3 lorl the purpose of defiecting the air, as it is admitted by the inlet vailve 46, upwardly to crea'te a partial vacuum.- over saidfoutlet or nozzle end of said primary mixing nozzle to= assist the discharge of the explosive mixture therefrom into said auxiliary mixing chamber' to mix Withthe air contained' therein. l

AL. spring.' latch' 54 is fitted intoy the bore forlnedin the bottom of the boss 55v to slide longitudinally therein andi saidlatch is situated so as to be moved into contact with the back of the valve 46 to 'lock thev same in closed position to: prevent the admission of air inte the auxiliary nixing chamber 1- soA that air isonly admitted to' said' chamber throu" h the primary mixing nozzle 3 thereby rendering the explosive mixture richerin hydrocarbon when suoli is required.

A spring protecting cap` 565 is securedi on' the top endr of the latch 54 which lits into the bore oli thei boss 55* to slide longitudinally therein, and said cap operates asf an inclosifng and protecting shield for the topi portion of saidr coil-spring. e

' Oni one side of the boss 55A is formed the arm: 58 on the end of which is pivota-lly cony nected# the bell-cranklever 59,'one arm 60f of which is rounded onitsunder side to form a' bearing contact with the top closedv endl of the cap 56, the other arm= 61: of saidbellcranlr lever being:v arranged to be connected: to asuitable connecting mechanisml whereby the operator may conveniently operate said2 spring-latch: to-loclr saidE inlet valve 46 closed to prevent the admission of air into the 4auxiliary mixingchamber 1.

rlhe operation of'this carburetor is as tol lows:`-Suppose the carburetor connected to an 'explosive engine of'any of the usual Well knovvn types of explosive-engines and thatl ysaid enginel has been put in motion to start the same seas to create al vacuum to draw a` charge of the explosive mixture inte the auxiliary mixing chamber 1 of the carburetor, then und'er this condition,I the atmospheric air first enters the elbow 8, then,.through the' 'slew-e4, to and*v through the primary' mixing baille collar 24 to break the divided jet of fluid fuel into a line spray to be absorbed or taken up by the air in passing through the throat 14 to the nozzle 15 to be' discharged therethrough and therefrom into the auxiliary mixing chamber 1, The explosive mixture may be further mixed with atmospheric air in the auxiliary mixing chamber 1 in which case the spring 45 is so adjusted that the valve 4G will open simultaneously With the flow of the air through the primary mix- 'ing nozzle 3, so that said explosive mixture,

as it flows from the ejecting nozzle 1Tinto said auxiliary mixing chamber, Will eommingle and mix with theair'contained in said auxiliary mixing chamber to reduce the quantity of hydrocarbon in the resulting mixture. The volume of hydrocarbon relative to the air admitted into the carbureter is proportional to the vacuum created in the auxiliary mixing chamber 1 and this fvacuum is entirely controlled by the throttle valve 19 situated in the nipple 18 and also the air admission valve 46 Which is automatically controlled by its closing spring 15.

When the explosive mixture is required to be rich in hydrocarbon, as when starting the engine, the valve 16 is locked closed, as previously described, so that all the air admitted into the auxiliary mixing chamber 1 must Ypass through the primary mixing nozzle 3, in which ease the amount of hydrocarbon taken up by the incomi-ng air may be regulated and controlled by the needle-valve 23.

I claim 1. In a carbureter, the combination With a fluid fuel supplying nozzle, a valve seat situated at the top end of the latter, a throat surrounding the top end of said nozzle, an air admission nozzle extending douniwardly from the open base end of said throat and terminating in an enlarged air inlet end, an ejecting'nozzle extending from the top outlet end of said throat terminatingin an enlarged ejecting end, and an air dellecting collar on the top end of said' fluid fuel supplying nozzle having its under surface inclined and situated to be approximately parallel with the inner lower surface of said throat, of a valve stem, a valve coacting with said valve s at on the end of said stem, a detlecting collar situated on said stem above said valve having its llatunder surface situated to be impinged against by the outllowing `iet of fluid fuel from the fluid fuel supplying nozzle.

2. In a carbureter, the combination with a. 4fluid fuel supplying nozzle, a valve seat situated on the top end of the latter, a spherically formed throat surrounding the top end of said nozzle, an air admission nozzle counected to the inlet open base end of said throat, said air admissionnozzle gradually expanding to its enlarged open air inlet end, and an ejecting nozzle connected .to the top outlet end of said throat, said nozzle having its bore gradually expanded toward its outlet end, of4 an air detleeting collar situated at the top end of said fluid fuel nozzle having its under surface approximately concentric with the inner lower surface of said throat, a valve stem, a valve on the end of said stem coacting with said valve seat, and a` detlecting collar situated on said stem above said valve so that its flat under surface Will be impinged against; by the outliowing jet ofvtluid fuel from the lluid fuel supplying nozzle.

3. In a. carbureter, the combination with a fluid fuel supplying nozzle, a valve seat on the top end of the latter, an air admission and primary mixing nozzle having a fluid fuel collecting peripheral groove situated at or nea-r the base thereof, a strainer surromnling said groove, a fluid fuel supplying duet integral with and extending across the open base of said air admission and primary mixing nozzle to connect the collecting groove and said fluid fuel supplying nozzle, an auxiliary mixing chamber connected to the open ejeeting end of said air admission and pri.- mary mixing nozzle, and a lluid fuel reservoir surrounding said latter nozzle, of a needle-valve coacting with said valve seat and a detlecting collar situated above said valve and having its flat under surface so situated above said needle-valve as to detlect the fluid discharged from sa id liuid fuel supplying nozzle.

4. In a carbureter, the combination with a fluid fuel supplying nozzle, a valve seat on the top end of the latter, an air admission and primary mixing nozzle having open base air inlet and top outlet ends surrounding said fluid fuel supplying nozzle, a tluid fuel reservoir surrounding said air admission and )rima-ry mixing nozzle, and a fluid fuel supplying duct connecting said. reservoir and said fluid fuel supliilying nozzle, of an auxiliary mixing` chamber, having opposing inlet and outlet openings, arranged to be connected to the outlet end of said air admission and primary mixing nozzle so that the latter will be situated intermediate the opposing inlet and outlet ends of said auxiliary mixing chamber, and a baille-plate extending across said auxiliary mixing chamber and situated adjacent the inlet. end thereof, said baille-plate having a curved top portion arranged to extend partially over the outlet end of said air admission and primary mixing nozzle.

0 t3. ln a carbureter, the combination with an auxiliary mixing chamber having an air :nlinission oilicning situated at one end oll said chamber and an opposing outlet open'- llt) ing, of a Huid fuel supplying nozzle, a valve 'chamber and lintermediate the air admission coacting with said nozzle, an air admission end and primary mixing nozzle. 10 and primary mlxlng nozzle surrounding said. In testimony whereof I affix my signature Huid fuel supplying nozzle having its open vin presence of .two Witnesses.

top end connected to Asaid auxiliary mixing FRANK H. HEITGER. chamber intermediate the air admission an Witnesses: outlet ends thereof and a baiHe-plate extend- THOMPSON R. BELL,

ing transversely of said auxiliary mixing JOHN D. FITZPATRIGK. 

